Explicitly select json converters, added Image and Int53 attributes, fixed a couple of routes.

src/Discord.Net/API/Common/Overwrite.cs

@@ -8,9 +8,9 @@ namespace Discord.API
         public ulong TargetId { get; set; }
         [JsonProperty("type")]
         public PermissionTarget TargetType { get; set; }
-        [JsonProperty("deny")]
+        [JsonProperty("deny"), Int53]
         public ulong Deny { get; set; }
-        [JsonProperty("allow")]
+        [JsonProperty("allow"), Int53]
         public ulong Allow { get; set; }
     }
 }

src/Discord.Net/API/Common/Role.cs

@@ -14,7 +14,7 @@ namespace Discord.API
         public bool? Hoist { get; set; }
         [JsonProperty("position")]
         public int? Position { get; set; }
-        [JsonProperty("permissions")]
+        [JsonProperty("permissions"), Int53]
         public ulong? Permissions { get; set; }
         [JsonProperty("managed")]
         public bool? Managed { get; set; }

src/Discord.Net/API/Common/UserGuild.cs

@@ -12,7 +12,7 @@ namespace Discord.API
         public string Icon { get; set; }
         [JsonProperty("owner")]
         public bool Owner { get; set; }
-        [JsonProperty("permissions")]
-        public uint Permissions { get; set; }
+        [JsonProperty("permissions"), Int53]
+        public ulong Permissions { get; set; }
     }
 }

src/Discord.Net/API/DiscordRawClient.cs

@@ -29,7 +29,7 @@ namespace Discord.API
         public TokenType AuthTokenType { get; private set; }
         public IRestClient RestClient { get; private set; }
         public IRequestQueue RequestQueue { get; private set; }
-        
+
         internal DiscordRawClient(RestClientProvider restClientProvider)
         {
             _restClient = restClientProvider(DiscordConfig.ClientAPIUrl);
@@ -38,18 +38,10 @@ namespace Discord.API
 
             _requestQueue = new RequestQueue(_restClient);
 
-            _serializer = new JsonSerializer();
-            _serializer.Converters.Add(new OptionalConverter());
-            _serializer.Converters.Add(new ChannelTypeConverter());
-            _serializer.Converters.Add(new ImageConverter());
-            _serializer.Converters.Add(new NullableUInt64Converter());
-            _serializer.Converters.Add(new PermissionTargetConverter());
-            _serializer.Converters.Add(new StringEntityConverter());
-            _serializer.Converters.Add(new UInt64ArrayConverter());
-            _serializer.Converters.Add(new UInt64Converter());
-            _serializer.Converters.Add(new UInt64EntityConverter());
-            _serializer.Converters.Add(new UserStatusConverter());
-            _serializer.ContractResolver = new OptionalContractResolver();
+            _serializer = new JsonSerializer()
+            {
+                ContractResolver = new DiscordContractResolver()
+            };
         }
 
         public async Task Login(TokenType tokenType, string token, CancellationToken cancelToken)
@@ -202,7 +194,7 @@ namespace Discord.API
         {
             if (guildId == 0) throw new ArgumentOutOfRangeException(nameof(guildId));
             
-            return await Send<IEnumerable<Channel>>("GET", $"guild/{guildId}/channels").ConfigureAwait(false);
+            return await Send<IEnumerable<Channel>>("GET", $"guilds/{guildId}/channels").ConfigureAwait(false);
         }
         public async Task<Channel> CreateGuildChannel(ulong guildId, CreateGuildChannelParams args)
         {
@@ -539,7 +531,7 @@ namespace Discord.API
         {
             if (guildId == 0) throw new ArgumentOutOfRangeException(nameof(guildId));
 
-            return await Send<IEnumerable<Role>>("GET", $"guild/{guildId}/roles").ConfigureAwait(false);
+            return await Send<IEnumerable<Role>>("GET", $"guilds/{guildId}/roles").ConfigureAwait(false);
         }
         public async Task<Role> CreateGuildRole(ulong guildId)
         {

src/Discord.Net/API/ImageAttribute.cs

@@ -0,0 +1,7 @@
+using System;
+
+namespace Discord.API
+{
+    [AttributeUsage(AttributeTargets.Property)]
+    public class ImageAttribute : Attribute { }
+}

src/Discord.Net/API/Int53Attribute.cs

@@ -0,0 +1,7 @@
+using System;
+
+namespace Discord.API
+{
+    [AttributeUsage(AttributeTargets.Property)]
+    public class Int53Attribute : Attribute { }
+}

src/Discord.Net/API/Rest/CreateGuildParams.cs

@@ -11,7 +11,7 @@ namespace Discord.API.Rest
         [JsonProperty("region")]
         public string Region { get; set; }
 
-        [JsonProperty("icon"), JsonConverter(typeof(ImageConverter))]
+        [JsonProperty("icon"), Image]
         public Optional<Stream> Icon { get; set; }
     }
 }

src/Discord.Net/API/Rest/ModifyCurrentUserParams.cs

@@ -14,7 +14,7 @@ namespace Discord.API.Rest
         public Optional<string> Password { get; set; }
         [JsonProperty("new_password")]
         public Optional<string> NewPassword { get; set; }
-        [JsonProperty("avatar"), JsonConverter(typeof(ImageConverter))]
+        [JsonProperty("avatar"), Image]
         public Optional<Stream> Avatar { get; set; }
     }
 }

src/Discord.Net/API/Rest/ModifyGuildParams.cs

@@ -16,11 +16,11 @@ namespace Discord.API.Rest
         public Optional<ulong?> AFKChannelId { get; set; }
         [JsonProperty("afk_timeout")]
         public Optional<int> AFKTimeout { get; set; }
-        [JsonProperty("icon"), JsonConverter(typeof(ImageConverter))]
+        [JsonProperty("icon"), Image]
         public Optional<Stream> Icon { get; set; }
         [JsonProperty("owner_id")]
         public Optional<GuildMember> Owner { get; set; }
-        [JsonProperty("splash"), JsonConverter(typeof(ImageConverter))]
+        [JsonProperty("splash"), Image]
         public Optional<Stream> Splash { get; set; }
     }
 }

src/Discord.Net/Discord.Net.csproj

@@ -67,6 +67,7 @@
     <Compile Include="API\Common\UserGuild.cs" />
     <Compile Include="API\Common\VoiceRegion.cs" />
     <Compile Include="API\Common\VoiceState.cs" />
+    <Compile Include="API\ImageAttribute.cs" />
     <Compile Include="API\IOptional.cs" />
     <Compile Include="API\IWebSocketMessage.cs" />
     <Compile Include="API\Optional.cs" />
@@ -105,7 +106,8 @@
     <Compile Include="Common\Entities\Users\StreamType.cs" />
     <Compile Include="DiscordConfig.cs" />
     <Compile Include="API\DiscordRawClient.cs" />
-    <Compile Include="Net\Converters\OptionalContractResolver.cs" />
+    <Compile Include="API\Int53Attribute.cs" />
+    <Compile Include="Net\Converters\DiscordContractResolver.cs" />
     <Compile Include="Net\Converters\OptionalConverter.cs" />
     <Compile Include="Net\RateLimitException.cs" />
     <Compile Include="Net\Rest\RequestQueue\BucketGroup.cs" />

src/Discord.Net/Net/Converters/ChannelTypeConverter.cs

@@ -5,7 +5,9 @@ namespace Discord.Net.Converters
 {
     public class ChannelTypeConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(ChannelType);
+        public static readonly ChannelTypeConverter Instance = new ChannelTypeConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/DiscordContractResolver.cs

@@ -0,0 +1,65 @@
+using Discord.API;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Reflection;
+
+namespace Discord.Net.Converters
+{
+    public class DiscordContractResolver : DefaultContractResolver
+    {        
+        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
+        {
+            var property = base.CreateProperty(member, memberSerialization);
+            var type = property.PropertyType;
+            JsonConverter converter = null;
+
+            if (member.MemberType == MemberTypes.Property)
+            {
+                //Primitives
+                if (type == typeof(ulong) && member.GetCustomAttribute<Int53Attribute>() == null)
+                    converter = UInt64Converter.Instance;
+                else if (type == typeof(ulong?) && member.GetCustomAttribute<Int53Attribute>() == null)
+                    converter = NullableUInt64Converter.Instance;
+                else if (typeof(IEnumerable<ulong[]>).IsAssignableFrom(type) && member.GetCustomAttribute<Int53Attribute>() == null)
+                    converter = NullableUInt64Converter.Instance;
+
+                //Enums
+                else if (type == typeof(ChannelType))
+                    converter = ChannelTypeConverter.Instance;
+                else if (type == typeof(PermissionTarget))
+                    converter = PermissionTargetConverter.Instance;
+                else if (type == typeof(UserStatus))
+                    converter = UserStatusConverter.Instance;
+
+                //Entities
+                else if (typeof(IEntity<ulong>).IsAssignableFrom(type))
+                    converter = UInt64EntityConverter.Instance;
+                else if (typeof(IEntity<string>).IsAssignableFrom(type))
+                    converter = StringEntityConverter.Instance;
+
+                //Special
+                else if (type == typeof(string) && member.GetCustomAttribute<ImageAttribute>() != null)
+                    converter = ImageConverter.Instance;
+                else if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Optional<>))
+                {
+                    var parentArg = Expression.Parameter(typeof(object));
+                    var optional = Expression.Property(Expression.Convert(parentArg, property.DeclaringType), member as PropertyInfo);
+                    var isSpecified = Expression.Property(optional, OptionalConverter.IsSpecifiedProperty);
+                    var lambda = Expression.Lambda<Func<object, bool>>(isSpecified, parentArg).Compile();
+                    property.ShouldSerialize = x => lambda(x);
+                    converter = OptionalConverter.Instance;
+                }
+            }
+            if (converter != null)
+            {
+                property.Converter = converter;
+                property.MemberConverter = converter;
+            }
+
+            return property;
+        }
+    }
+}

src/Discord.Net/Net/Converters/ImageConverter.cs

@@ -7,7 +7,9 @@ namespace Discord.Net.Converters
 {
     public class ImageConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(Stream) || objectType == typeof(Optional<Stream>);
+        public static readonly ImageConverter Instance = new ImageConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/NullableUInt64Converter.cs

@@ -6,7 +6,9 @@ namespace Discord.Net.Converters
 {
     public class NullableUInt64Converter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(ulong?);
+        public static readonly NullableUInt64Converter Instance = new NullableUInt64Converter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/OptionalContractResolver.cs

@@ -1,34 +0,0 @@
-using Discord.API;
-using Newtonsoft.Json;
-using Newtonsoft.Json.Serialization;
-using System;
-using System.Linq.Expressions;
-using System.Reflection;
-
-namespace Discord.Net.Converters
-{
-    public class OptionalContractResolver : DefaultContractResolver
-    {
-        private static readonly PropertyInfo _isSpecified = typeof(IOptional).GetProperty(nameof(IOptional.IsSpecified));
-
-        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
-        {
-            var property = base.CreateProperty(member, memberSerialization);
-            var type = property.PropertyType;
-
-            if (member.MemberType == MemberTypes.Property)
-            {
-                if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Optional<>))
-                {
-                    var parentArg = Expression.Parameter(typeof(object));
-                    var optional = Expression.Property(Expression.Convert(parentArg, property.DeclaringType), member as PropertyInfo);
-                    var isSpecified = Expression.Property(optional, _isSpecified);
-                    var lambda = Expression.Lambda<Func<object, bool>>(isSpecified, parentArg).Compile();
-                    property.ShouldSerialize = x => lambda(x);
-                }
-            }
-
-            return property;
-        }
-    }
-}

src/Discord.Net/Net/Converters/OptionalConverter.cs

@@ -1,12 +1,16 @@
 using Discord.API;
 using Newtonsoft.Json;
 using System;
+using System.Reflection;
 
 namespace Discord.Net.Converters
 {
     public class OptionalConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType.IsGenericType && objectType.GetGenericTypeDefinition() == typeof(Optional<>);
+        public static readonly OptionalConverter Instance = new OptionalConverter();
+        internal static readonly PropertyInfo IsSpecifiedProperty = typeof(IOptional).GetProperty(nameof(IOptional.IsSpecified));
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => false;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/PermissionTargetConverter.cs

@@ -5,7 +5,9 @@ namespace Discord.Net.Converters
 {
     public class PermissionTargetConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(PermissionTarget);
+        public static readonly PermissionTargetConverter Instance = new PermissionTargetConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/StringEntityConverter.cs

@@ -5,7 +5,9 @@ namespace Discord.Net.Converters
 {
     public class StringEntityConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(IEntity<string>);
+        public static readonly StringEntityConverter Instance = new StringEntityConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => false;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/UInt64ArrayConverter.cs

@@ -7,7 +7,9 @@ namespace Discord.Net.Converters
 {
     public class UInt64ArrayConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(IEnumerable<ulong[]>);
+        public static readonly UInt64ArrayConverter Instance = new UInt64ArrayConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/UInt64Converter.cs

@@ -6,7 +6,9 @@ namespace Discord.Net.Converters
 {
     public class UInt64Converter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(ulong);
+        public static readonly UInt64Converter Instance = new UInt64Converter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;
 

src/Discord.Net/Net/Converters/UInt64EntityConverter.cs

@@ -1,11 +1,14 @@
 using Newtonsoft.Json;
 using System;
+using System.Globalization;
 
 namespace Discord.Net.Converters
 {
     public class UInt64EntityConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(IEntity<ulong>);
+        public static readonly UInt64EntityConverter Instance = new UInt64EntityConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => false;
         public override bool CanWrite => true;
 
@@ -17,7 +20,7 @@ namespace Discord.Net.Converters
         public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
         {
             if (value != null)
-                writer.WriteValue((value as IEntity<ulong>).Id);
+                writer.WriteValue((value as IEntity<ulong>).Id.ToString(CultureInfo.InvariantCulture));
             else
                 writer.WriteNull();
         }

src/Discord.Net/Net/Converters/UserStatusConverter.cs

@@ -5,7 +5,9 @@ namespace Discord.Net.Converters
 {
     public class UserStatusConverter : JsonConverter
     {
-        public override bool CanConvert(Type objectType) => objectType == typeof(UserStatus);
+        public static readonly UserStatusConverter Instance = new UserStatusConverter();
+
+        public override bool CanConvert(Type objectType) => true;
         public override bool CanRead => true;
         public override bool CanWrite => true;